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问题的提出 1.产品情况:大型电站锅炉集箱的工作温度为550℃,压力为150公斤/厘米~2或更高。锅炉集箱上焊有大量密布的管座,一台配12.5万千瓦机组的400吨/时锅炉,集箱管座超过5000只。配30万千瓦机组的1000吨/时锅炉需焊集箱管座近10000只。锅炉汽包上也焊有很多种口径的管座。其中约50％是合金钢。 2.存在问题:对锅炉受压容器管座角焊缝质量要求很高。以往一直采用手工电弧焊生产,效率低,质量不稳定,在焊缝
Proposed problems 1. Products: Large power station boiler header temperature of 550 ℃, the pressure is 150 kg / cm ~ 2 or higher. A large number of boiler headers are welded to the boiler header. A 400 t / h boiler with a 125 MW unit and a collector header with more than 5000 headers. With 30 million kilowatts of 1000 tons / hour boilers need to weld header nearly 10,000. There are also many kinds of caliber socket welded on the boiler drum. About 50% of them are alloyed steel. 2. Existing problems: high pressure on the boiler pressure vessel socket weld quality requirements. In the past has been the use of manual arc welding production, low efficiency, unstable quality, in the weld